mostly personalities or voices of characters are different, sometimes even a different character is used
joyce is usualy voiced by amy but tommy62702 uses susan for joyce's voice.
there is a character that tries to mock the user behind tommy62702 using the brian voice.
sonic is also voiced by brian in tommy62702 videos.
personality and character difference
brian in tommy62702 videos uses brian as the brown tuxedo guy.
the ВИD mask uses a non evil personality.
that goes the same with other scary logos.
splaat rarely uses a picture of him outlined with white lines (this will be in future videos).
eric uses multiple versions.